EP 4382491 A1 20240612 - METHOD FOR RECOVERING PHOSPHOROUS AND METAL IONS FROM DILUTE AQUEOUS FEEDS USING CEMENTITIOUS ADSORBENTS
Title (en)
METHOD FOR RECOVERING PHOSPHOROUS AND METAL IONS FROM DILUTE AQUEOUS FEEDS USING CEMENTITIOUS ADSORBENTS
Title (de)
VERFAHREN ZUR RÜCKGEWINNUNG VON PHOSPHOR- UND METALLIONEN AUS VERDÜNNTEN WÄSSRIGEN EINSÄTZEN UNTER VERWENDUNG ZEMENTARTIGER ADSORPTIONSMITTEL
Title (fr)
PROCÉDÉ DE RÉCUPÉRATION D'IONS DE PHOSPHORE ET DE MÉTAL À PARTIR DE CHARGES AQUEUSES DILUÉES UTILISANT DES ADSORBANTS CIMENTAIRES
Publication
Application
Priority
EP 22212266 A 20221208
Abstract (en)
A robust and economically viable technology is developed for the phosphorus (P) and metals recovery from dilute aqueous feeds. This is one of the first efforts to recover P and contaminants from the wastewater streams using adsorbents without the need of incineration and acid leaching of the sludge. P is becoming very critical raw material and nutrient for the agricultural and industrial uses and most of the produced materials are lost in the water bodies. The process technology addresses the P management using the cementitious inorganic adsorbent containing transition and alkali metals like Al, Fe, Mg, Ca, Na and S, but not limited to this. The sequence of interconversion in solution chemistry via inorganic sulphates and hydroxides can produce the economic products such as phosphoric acid and struvite or transition metal salts. The developed technology has the potential for scale up on industrial scale, re-use of components and preconcentration of dilute P and metal contents as well as extended use for recovering from other industrial aqueous feeds after the corresponding optimization. The clear advantage with the claimed process is that it can avoid the use of strong mineral acid and high temperature pyrometallurgical treatments to reach the similar products without negative environmental impact.
IPC 8 full level
C02F 1/28 (2023.01); C02F 1/52 (2023.01); C02F 1/66 (2023.01); C02F 101/10 (2006.01); C02F 103/10 (2006.01)
CPC (source: EP)
C02F 1/281 (2013.01); C02F 1/5245 (2013.01); C02F 1/66 (2013.01); C02F 2101/105 (2013.01); C02F 2103/10 (2013.01); C02F 2209/06 (2013.01); C02F 2301/046 (2013.01)
Citation (search report)
- [XI] WO 2015162540 A1 20151029 - PAXTON RICHARD GEORGE [GB], et al
- [I] CN 111003781 A 20200414 - UNIV CHENGDU TECHNOLOGY
- [A] US 2009013742 A1 20090115 - ZHANG TIANXI [US], et al
- [A] WO 2017108933 A1 20170629 - KEMIRA OYJ [FI]
- [I] KAMIMOTO YUKI ET AL: "Removal properties of phosphate with Ettringite", DESALINATION AND WATER TREATMENT, 1 January 2017 (2017-01-01), UK, pages 478 - 482, XP093038908, ISSN: 1944-3994, Retrieved from the Internet <URL:http://dx.doi.org/10.5004/dwt.2017.11454> DOI: 10.5004/dwt.2017.11454
- [I] WU ROU-JIN ET AL: "Removal of Phosphate Using Ettringite Synthesized from Industrial By-products", WATER, AIR, SPRINGER INTERNATIONAL PUBLISHING, CHAM, vol. 229, no. 6, 25 May 2018 (2018-05-25), pages 1 - 14, XP036512881, ISSN: 0049-6979, [retrieved on 20180525], DOI: 10.1007/S11270-018-3828-8
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
DOCDB simple family (application)
EP 22212266 A 20221208; EP 2023082798 W 20231123